# NOTE: This code require service-bus package > 7.x
# ------------------------------------------------------
import os
from azure.servicebus import ServiceBusClient, Message
from azure.identity import ClientSecretCredential
#topic & subscription connection details
FULLY_QUALIFIED_NAMESPACE = os.environ['SERVICE_BUS_NAMESPACE']
TOPIC_NAME = os.environ["SERVICE_BUS_TOPIC_NAME"]
SUBSCRIPTION_NAME = os.environ["SERVICE_BUS_SUBSCRIPTION_NAME"]
# credentials details
AZURE_TENANT_ID = os.environ["AZURE_TENANT_ID"]
AZURE_CLIENT_SECRET = os.environ["AZURE_CLIENT_SECRET"]
AZURE_CLIENT_ID = os.environ["AZURE_CLIENT_ID"]
credential = ClientSecretCredential(tenant_id=AZURE_TENANT_ID,
client_id=AZURE_CLIENT_ID,
client_secret=AZURE_CLIENT_SECRET)
servicebus_client = ServiceBusClient(FULLY_QUALIFIED_NAMESPACE, credential)
receiver = servicebus_client.get_subscription_receiver(
topic_name=TOPIC_NAME, subscription_name=SUBSCRIPTION_NAME)
with receiver:
for message in receiver.get_streaming_message_iter():
print(str(message))
message.complete()
def test_backoff_fixed_retry(self):
client = ServiceBusClient('fake.host.com',
'fake_eh',
retry_mode='fixed')
# queue sender
sender = client.get_queue_sender('fake_name')
backoff = client._config.retry_backoff_factor
start_time = time.time()
sender._backoff(retried_times=1,
last_exception=Exception('fake'),
abs_timeout_time=None)
sleep_time_fixed = time.time() - start_time
# exp = 0.8 * (2 ** 1) = 1.6
# time.sleep() in _backoff will take AT LEAST time 'exp' for retry_mode='exponential'
# check that fixed is less than 'exp'
assert sleep_time_fixed < backoff * (2**1)
# topic sender
sender = client.get_topic_sender('fake_name')
backoff = client._config.retry_backoff_factor
start_time = time.time()
sender._backoff(retried_times=1,
last_exception=Exception('fake'),
abs_timeout_time=None)
sleep_time_fixed = time.time() - start_time
assert sleep_time_fixed < backoff * (2**1)
# queue receiver
receiver = client.get_queue_receiver('fake_name')
backoff = client._config.retry_backoff_factor
start_time = time.time()
receiver._backoff(retried_times=1,
last_exception=Exception('fake'),
abs_timeout_time=None)
sleep_time_fixed = time.time() - start_time
assert sleep_time_fixed < backoff * (2**1)
# subscription receiver
receiver = client.get_subscription_receiver('fake_topic', 'fake_sub')
backoff = client._config.retry_backoff_factor
start_time = time.time()
receiver._backoff(retried_times=1,
last_exception=Exception('fake'),
abs_timeout_time=None)
sleep_time_fixed = time.time() - start_time
assert sleep_time_fixed < backoff * (2**1)
client = ServiceBusClient('fake.host.com',
'fake_eh',
retry_mode=RetryMode.Fixed)
# queue sender
sender = client.get_queue_sender('fake_name')
backoff = client._config.retry_backoff_factor
start_time = time.time()
sender._backoff(retried_times=1,
last_exception=Exception('fake'),
abs_timeout_time=None)
sleep_time_fixed = time.time() - start_time
# exp = 0.8 * (2 ** 1) = 1.6
# time.sleep() in _backoff will take AT LEAST time 'exp' for retry_mode='exponential'
# check that fixed is less than 'exp'
assert sleep_time_fixed < backoff * (2**1)
